Tool and apparatus for leveling cylindrical surfaces from grinding disks



Jan. 10,1933. LEBERT 1,894,181

TOOL AND APPARATUS FOR LEVELING CYLINDRICAL SURFACES FROM GRINDING DISKS Filed 001;. l, 1931 l atentecl Jan. 10, 1933 UNITED STATES PATENT OFFICE ALFRED LEBERT, F DUSSELIDORF, GERMANY TOOL AND APPARATUS FOR LEVELING CYLINDRICAL SURFACES FROM GRINDING DISKS Application filed October 1, 1931, Serial No. 566,384, and in Germany October 1, 1930.

. in the composed state in a pinion like manturning Ofi f i ding disks. At this end sary on the recomposing to ad ust or bring ner assuring thus the axial position of the bearing. Advantageously the connecting place of the two flanges coincides with the fixing point of the instrument machine.

The use of swaying disks is known for the several swaying disks have been fixed on an apparatus held in hand. By the present invention the use of such swaying disks becomes also possible for the leveling of grind ing disks for precision appliances. The subdivision of the apparatus into two flanges the one fitting into the other in a pinion like manner allows an easy and rapid exchange of the swaying disks, without it being neceson a level the bearings. The new instrument can be used instead of natural diamonds. Consequently the available space for fixing the tool is generally too small in the machines actually used. This disadvantage is eliminated according to the present invention by the fact that the connecting place of the flanges coincides with the fixing place of the instrument to the machine, so that it is possible to reduce the longitudinal construction of the flanges to the minimum. This manner to proceed allows a further advantage.

In order to realize an absolutely rigid fixing of the swaying disks, it is necessary to compress the two flanges at a very high pressure. This manner of proceeding requires according to the present invention no special means, but the necessary pressure for the fixing of the complete apparatus on the machine, for instance on the tail stock, can also be utilized for the compressing of the flanges. Thus the construction becomes not only simple and space-reducing but also very cheap.

Further improvements exist in the special construction of the swaying disk itself described hereabove.

According to one improvement, the swaying disk havingaperipherical undulated form presents the characteristic feature that the depth of undulations to the nave is entirely uniform at all points of the disk. The undulation on the one face can moreover be independent from the undulation on the other face. Moreover the disk can also be formed in such a way that the undulations have the identical phases, i. e. that the raised undulated part on the one face corresponds also to an identical part on the other face. Therefore it is an entire balance of the efforts acting on the disk and on the bearings. It is a matter of fact that the constructional form may be changed in any other way; so the undulated convex part'on the one side canbe displaced as required to that on the opposite face; according to another construction the one face of the disk can be entirely level.

On the accompanying drawing different forms of embodiment are represented:

Fig. 1 is a longitudinal section of the apparatus,

Fig. 2 is a front view,

Fig. 3 is a side view of the grinding disk,

Fig. 1 is a front view of the same,

Figs. 5 and 6 show modified forms of the disk.

The apparatus comprises a flange 1 to be placed on a pin etc., and a second flange 2 both connected by an annular screw 6. The flange 1- is provided with a boring into which isintroduced the conical bolt 9 of the machine, whereon the flange 1 and consequently the complete device is fixed by means of the screw 11 and thewasher.

In view of the attaching form, the screw .11 assures after its screwing down a perfect contact of both flanges and a regular position of the swaying disk.

The flange 1 moreover contains an axis. 3 turning on ball-bearings 1-2, 13. This conical axis 3 supports the swaying disk 4. A special ring 5 assures the fixing of the latter on the axis 3. The threaded stopper 7 and the annular screw 8 within the flange 2 assure the fixing and the adjusting of the ball-bearhe hub of the compressing ring constitutes a part of the labyrinth-space, filled up 5 with grease, which prevents the enterin of cooling water or impurities etc. into the all bearings. The grinding-or turning-off effect i realized by the fact that the border of the disk 4 describes in the known manner 10 an undulated line so that an oscillating moveand 4 shows the characteristic feature that the depth of the undulations, extended to the hub, is the same on every point of the disk.

Thus the disadvantage of known disks is avoided, in which the undulation diminishes progressively towards the hub, whereby the cutting-effect decreases with wear of the disk, while this effect remains continuously the same up to the hub. The swaying disk is advantageously made of one piece. The undulatians can be made on a turning-lathe by means of a curved lineal or disk. The clean ud perfect work obtained in this way allows t e use of such swayin disks for the leveling of recision grinding isks.

Ei s. 5 and 6 show two modified forms. In ;g. 5 the undulations are only provided 2. Apparatus as claimed in claim 1, in which the means for securing and adjusting the bearings is a stopper threaded in an opening in the second named member and means to secure said stopper.

3. Apparatus as claimed in claim 1, in which the means for securing the swaying disk on the tapered enlarged portion of the second shaft is a ring threaded on the enlarged portion of the second shaft and bearing against one side of the nave of the swaying d sk.

Apparatus as claimed in claim 1, in which the swayin disk has a nave and is provided in its wall without the nave with undulations, the depth of each of which is con- (sitaifit from the nave to the periphery of the In testimony whereof I have hereunto set my hand this 18th day of September A. D.

ALFRED LEBERT.

on one side. Fig. 6 shows a form of embodimerit wherein the undulations are symmetrioil on both faces, but they may also be displaced reciprocally independently.

in general the undulations on the one face can be entirely independent from those on 'th 0p osite face.

in t e difl'erent forms of construction the thickness of the hub is greater than the thickness of the disk with its undulations.

The hub-boring is preferably conical.

, I claim: Y

1. Apparatus of the class described, comprising a machine shaft, a pair of members one having an opening for the reception of said machine shaft and also having an annular flange extending from its inner side and around the said shaft and the other having an opening to receive said flange and means to clamp said members securel together, a second shaft arranged 'eccentrlcally of the machine shaft and mounted for rotation in bearings with which said members are provided, said second shaft having an enlarged portion tapered in one direction between said members, a swaying disk having a nave provided with a tapered bore and fitted on said tapered portion of said second shaft, said swaying disk being arranged between and carried by said members, means to secure the swaying disk on the enlarged and tapered 1 portion of said second shaft and means to secure and adjust the bearings in the membars. 

